<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>反转两次的数字</title>
</head>
<body>
  <script>
    function fn(num) {
      temp = parseInt(String(num).split('').reverse().join(''));
      temp = parseInt(String(temp).split('').reverse().join(''));
      return temp === num
    }
    console.log(fn(526))
  </script>
</body>
</html>